One of the biggest positives to come out of the last year of offensive line development is what has happened at the interior positions among the big uglies. Two years ago the Sooners struggled to work Chris Bush and Chris Chester into the center position.

The Sooners also struggled trying to figure out if Davin Joseph's home was going to be at guard or tackle.

As the Sooners head into the 2007 season, guard and center positions aren't just stocked with talent, they're stocked with versatile depth that is fighting for starting positions. SoonerScoop.com Editor Carey Murdock finishes off our offensive position grade cards with the interior offensive line.

Jon Cooper - Jon Cooper is firmly entrenched as the Sooners starter at offensive center. When he first came to Oklahoma, he surprised veterans with his toughness. Chris Bush loved playing next to him saying he was the meanest freshman he'd ever seen.

Cooper's broken leg suffered during his true freshman season ended up being a very serious injury. He played last season never feeling completely healthy. But the pain Cooper has had to deal with over the last year started to subside this spring.

And now it appears that Cooper is close to making his way back into that freshman form. He's the most experienced member of the offensive line with two years of starts under his belt. And even though he's one of the smaller guys on the line, he means as much as anyone to the success of the Oklahoma offense next season.